private void btnLabel_Click(object sender, RoutedEventArgs e)
{
//The FeatureLayer for labelling
IFeatureLayer labelLayer = this.m_map.Map.get_Layer(0) as IFeatureLayer;
IGeoFeatureLayer gLabelLayer = labelLayer as IGeoFeatureLayer;
IAnnotateLayerPropertiesCollection annoPropCol = gLabelLayer.AnnotationProperties;
annoPropCol.Clear();
//ITextSymbol uasage
ITextSymbol pTextSyl = new TextSymbol();
//Font fnt = new System.Drawing.Font("宋体", 10f, System.Drawing.FontStyle.Regular, System.Drawing.GraphicsUnit.Point);
//using stdole
IFontDisp font = new StdFont() as IFontDisp;
font.Size = 20;
font.Italic = true;
// pTextSyl.Size = 20;
pTextSyl.Font = font;
//IRgbColor fromColor = new RgbColor(255,0, 0);
//ESRI.ArcGIS.Display.RgbColorClass()
RgbColor color = new RgbColor();
color.Red = 255;
color.Green = 0;
color.Blue = 0;
pTextSyl.Color = color;
//Position
IBasicOverposterLayerProperties pBasic = new BasicOverposterLayerProperties();
// if (labelLayer.FeatureClass.ShapeType == esriGeometryType.esriGeometryPoint)
// {
IPointPlacementPriorities pPlacementPoint = new PointPlacementPriorities();
pBasic.FeatureType = esriBasicOverposterFeatureType.esriOverposterPoint;
pBasic.PointPlacementPriorities = pPlacementPoint;
pBasic.PointPlacementOnTop = false;
pBasic.PointPlacementMethod = esriOverposterPointPlacementMethod.esriOnTopPoint;// esriAroundPoint;
// }
//Point a field as a label
ILabelEngineLayerProperties labelField = new LabelEngineLayerProperties() as ILabelEngineLayerProperties;
labelField.Expression = "[name]";
//set postion
labelField.BasicOverposterLayerProperties = pBasic;
//set symbol
labelField.Symbol = pTextSyl;
IAnnotateLayerProperties annoProp = labelField as IAnnotateLayerProperties;
annoPropCol.Add(annoProp);
gLabelLayer.DisplayAnnotation = true;
m_map.Refresh();
}
private void ShowLabel()
{
if (labelOn)
{
if (!this.cbxActiveMap.HasItems || !this.cbxFeatureLayer.HasItems || !this.cbxField.HasItems)
{
return;
}
if (annoPropCol != null)
{
annoPropCol.Clear();
}
labelLayer = this.m_map.Map.get_Layer(this.cbxFeatureLayer.SelectedIndex) as IFeatureLayer;
gLabelLayer = labelLayer as IGeoFeatureLayer;
annoPropCol = gLabelLayer.AnnotationProperties;
ITextSymbol pTextSyl = new TextSymbol();
IFontDisp font = new StdFont() as IFontDisp;
font.Size = 20;
font.Italic = true;
pTextSyl.Font = font;
RgbColor color = new RgbColor();
color.Red = LabelColor.R;
color.Green = LabelColor.G;
color.Blue = LabelColor.B;
pTextSyl.Color = color;
IBasicOverposterLayerProperties pBasic = new BasicOverposterLayerProperties();
IPointPlacementPriorities pPlacementPoint = new PointPlacementPriorities();
pBasic.FeatureType = esriBasicOverposterFeatureType.esriOverposterPoint;
pBasic.PointPlacementPriorities = pPlacementPoint;
pBasic.PointPlacementOnTop = false;
pBasic.PointPlacementMethod = esriOverposterPointPlacementMethod.esriOnTopPoint;
ILabelEngineLayerProperties labelField = new LabelEngineLayerProperties() as ILabelEngineLayerProperties;
//IFeatureClass fClass = ((IFeatureLayer)labelLayer).FeatureClass;
//IFields fields = fClass.Fields;
//String fieldName = fields.get_Field(this.cbxField.SelectedIndex).Name;
string fieldName = (string)cbxField.SelectedItem;
//Console.WriteLine(fields.FindField(fieldName));
labelField.Expression = "[" + fieldName + "]";
//set postion
labelField.BasicOverposterLayerProperties = pBasic;
//set symbol
labelField.Symbol = pTextSyl;
IAnnotateLayerProperties annoProp = labelField as IAnnotateLayerProperties;
annoPropCol.Add(annoProp);
gLabelLayer.DisplayAnnotation = true;
m_map.Refresh();
}
}